Message ID | 20241016202814.4061541-1-samuel.holland@sifive.com (mailing list archive) |
---|---|
Headers | show |
Series | riscv: Userspace pointer masking and tagged address ABI | expand |
Hello: This series was applied to riscv/linux.git (for-next) by Palmer Dabbelt <palmer@rivosinc.com>: On Wed, 16 Oct 2024 13:27:41 -0700 you wrote: > RISC-V defines three extensions for pointer masking[1]: > - Smmpm: configured in M-mode, affects M-mode > - Smnpm: configured in M-mode, affects the next lower mode (S or U-mode) > - Ssnpm: configured in S-mode, affects the next lower mode (VS, VU, or U-mode) > > This series adds support for configuring Smnpm or Ssnpm (depending on > which privilege mode the kernel is running in) to allow pointer masking > in userspace (VU or U-mode), extending the PR_SET_TAGGED_ADDR_CTRL API > from arm64. Unlike arm64 TBI, userspace pointer masking is not enabled > by default on RISC-V. Additionally, the tag width (referred to as PMLEN) > is variable, so userspace needs to ask the kernel for a specific tag > width, which is interpreted as a lower bound on the number of tag bits. > > [...] Here is the summary with links: - [v5,01/10] dt-bindings: riscv: Add pointer masking ISA extensions https://git.kernel.org/riscv/c/8946ad26c0e2 - [v5,02/10] riscv: Add ISA extension parsing for pointer masking https://git.kernel.org/riscv/c/12749546293e - [v5,03/10] riscv: Add CSR definitions for pointer masking https://git.kernel.org/riscv/c/1edd6226877b - [v5,04/10] riscv: Add support for userspace pointer masking https://git.kernel.org/riscv/c/871aba681a0d - [v5,05/10] riscv: Add support for the tagged address ABI https://git.kernel.org/riscv/c/c4d16116bd11 - [v5,06/10] riscv: Allow ptrace control of the tagged address ABI https://git.kernel.org/riscv/c/cebce87fb04e - [v5,07/10] riscv: selftests: Add a pointer masking test https://git.kernel.org/riscv/c/5e9f1ee1c523 - [v5,08/10] riscv: hwprobe: Export the Supm ISA extension https://git.kernel.org/riscv/c/d250050aae4f - [v5,09/10] RISC-V: KVM: Allow Smnpm and Ssnpm extensions for guests https://git.kernel.org/riscv/c/e27f468bcf14 - [v5,10/10] KVM: riscv: selftests: Add Smnpm and Ssnpm to get-reg-list test https://git.kernel.org/riscv/c/814779461d84 You are awesome, thank you!